//Name:
//Purpose:
//Author: wjy
//Date: 2022-01-25 12:03:50
//From:

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    int num;
    printf("Enter a num: ");
    scanf("%d", &num);
    for (int i = 1; i * i <= num; i++)
    {
        if (i % 2 == 0)
            printf("%d\n", i * i);
    }
    system("pause");
    return 0;
}